in the webassist/security_assist/heler_php.php file, change lines 51-53:
if (isset($_GET['accesscheck'])) {
$WA_Auth_Parameter["successRedirect"] = urldecode($_GET['accesscheck']);
}
to:
if (isset($_GET['accesscheck']) && $WA_Auth_Parameter["gotoPreviousURL"]) {
$WA_Auth_Parameter["successRedirect"] = urldecode($_GET['accesscheck']);
}